JP2002503600A - Detachable switchgear for vinyl containers - Google Patents

Abstract

(57) [Summary] Inside the cut portion of the vinyl container, a male screw member having a first thread formed on the outer peripheral surface is installed. A through hole is formed in the male screw member for passing the contents inside the vinyl container. The male screw member is screwed with a gap with the female screw member. A vinyl container is inserted into the screw gap. In order to facilitate the insertion of the vinyl container, the diameter of the first threaded portion of the male screw type member is gradually reduced toward the lower part or is increased to be larger. A through-hole formed in the male screw-type member and through which the contents pass is opened and closed by a lid member. Therefore, if the lid member is opened, the contents in the vinyl container can be easily transferred, and if the lid member is closed, the contents can be easily stored.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a detachable opening / closing device for a vinyl container in which contents can be easily transferred.

2. Description of the Related Art In general, a vinyl container is used for packaging powdered materials such as sugar, salt, and coffee that are added to food. Also, in order to save this container such as detergents and shampoos, saving vinyl containers are used for refill detergents or shampoos.

[0003] Such a plastic container is used by cutting one corner of the upper end with scissors or the like when the contents are used, and when the contents remain after use, the cut surface is folded and stored without a separate sealing means. I was

FIG. 1 is a schematic perspective view of a conventional vinyl container in a cut state.

Conventionally, when the end portion of the vinyl container 20 is cut off and the contents are to be transferred and used, it is difficult not only to transfer a desired appropriate amount but also to discharge the vinyl container after transferring the contents. The contents were stuck to the exit 22 or its surroundings, which was troublesome in terms of maintaining cleanliness.

In particular, when a liquid content such as a shampoo or a detergent contained in a refill vinyl container is to be transferred to the container and used, the refill vinyl container is stably fixed to the mouth of the container. , It was difficult to cleanly and easily transfer the contents to the container.

In addition, when the container is small, the refill vinyl container must be stored in a state where the contents remain, and it is inconvenient to take care that the refill vinyl container does not fall over and the contents are spilled. was there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to
An object of the present invention is to provide a detachable opening / closing device for a vinyl container, which facilitates the transfer and storage of the contents and keeps the storage state clean.

In order to achieve the above object, the present invention facilitates the transfer and storage of the contents in a vinyl container, and is housed inside a cut portion of the vinyl container to keep the storage state clean. A first thread is formed on the outer peripheral surface,
A male screw-type member having a through hole formed in the vinyl container along the axial direction to allow the contents in the vinyl container to pass therethrough; the male screw-type member can be screwed with the male screw-type member across the vinyl container. A second thread is formed on the inner peripheral surface of the vinyl container so as to be screwed with a screw gap between the first screw and the first screw outside, and a cut portion of the vinyl container is arranged in the screw gap. A female screw-type member that seals the vinyl container by screwing with the male screw-type member; and an external member that is formed on the upper part of the male screw-type member and opens and closes the through-hole to open and close the vinyl container. And a lid member for opening or closing the container.

According to the detachable opening / closing device for a vinyl container of the present invention, the cut portion of the vinyl container is completely sealed by the male screw type member and the female screw type member, and the male screw type member has a central axis. A through-hole is formed along the opening, and a lid member for opening and closing is formed above the through-hole. Therefore, if the lid member is opened, the contents of the vinyl container can be easily and cleanly transferred, and if the lid member is sealed, the contents can be stored easily and cleanly.

The above objects and advantages of the present invention will be more apparent from the following detailed description of the preferred embodiments with reference to the accompanying drawings.

BEST MODE FOR CARRYING OUT THE INVENTION A detachable opening / closing device for a vinyl container according to the present invention will be described below in detail with reference to the accompanying drawings based on Examples 1 to 5.

Embodiment 1 FIG. 2 is a schematic perspective view of a detachable opening / closing device for a vinyl container according to Embodiment 1 of the present invention, and FIG. 3A shows a state before the opening / closing device of FIG. 2 is connected to the vinyl container. FIG. 3B is a cross-sectional view showing the state after coupling.

As shown in FIGS. 2, 3A and 3B, the detachable opening / closing device 100 for a vinyl container according to the first embodiment of the present invention is accommodated inside the cut portion 13 of the vinyl container 10. It has an external thread type member 170. A first thread 171 is formed on the outer peripheral surface of the male screw member 170. In addition, a first cylinder-shaped main body 174 having a through hole 173 along the axial direction is formed to allow the contents in the vinyl container 10 to pass therethrough.

The male screw member 170 and the female screw member 150 are screwed together with the vinyl container 10 interposed therebetween. The female screw member 150 is a tightening nut, and the second through hole 15
3 having a second cylindrical body 154 formed therein. The above female screw type member 150
A second screw thread 151 is formed on the inner peripheral surface of the first screw thread 171 outside the male screw member 170 so as to have a screw gap 160 with the first screw thread 171. By cutting the cut portion 13 of the vinyl container 10 into the screw gap 160, the vinyl container 10 is sealed by screwing the female screw member 150 and the male screw member 170.

A cover member 110 is installed above the male screw member 170. The lid member 1
10 opens or closes the vinyl container 10 to the outside by opening and closing the through hole 173. A discharge port 113 communicating with the through hole 173 of the male screw member 170 is formed inside the lid member 110.

An upper sealing ring 175 is integrally formed on the first thread 171 of the male screw member 170. The upper sealing ring 175 prevents the female screw member 150 from being detached from the male screw member 170.

A lower sealing ring 1 is provided below the first thread 171 of the male screw member 170.
77 are integrally formed. The lower sealing ring 177 further improves the sealing effect of the vinyl container 10 by fixing the female screw member 150 to the male screw member 170 in a tightly adhered state.

Hereinafter, a process of attaching the detachable opening / closing device 100 for a vinyl container as described above to the vinyl container 10 will be described.

First, in order to transfer the contents, an end of the plastic container 10 containing the contents is cut off.

The male screw member 170 has a female screw member, that is, a tightening nut 150 fitted on the upper end of the first thread 171. The lower portion of the male screw member 170, that is, the portion where the first thread 171 is formed is inserted into the cut portion 13 of the vinyl container 10. The upper end of the cut portion 13 of the vinyl container 10 is fixed to the first thread 171 of the male screw member 170 and the second screw of the tightening nut 150 while the cut portion 13 is narrowed and brought into close contact with the first screw 171. It is inserted into the screw gap 160 between the ridge 151.

Then, as shown in FIG. 3B, the tightening nut 150 is turned down. As a result, the cut portion 13 of the vinyl container 10 fitted in the screwing gap 160 between the male screw member 170 and the tightening nut 150 comes into close contact with the male screw member 170 by the tightening nut 150, and A switching device 100 is installed at 10.

The method of using the vinyl container 10 to which the opening and closing device 100 is attached is as follows.

First, the user opens the lid member 110 and transfers the contents such as shampoo and detergent to a container into which the contents are transferred through the outlet 113. Thereafter, the lid member 110 is closed and the vinyl container 10 is stored in a sealed state.

When the inside of the vinyl container 10 is emptied and the vinyl container 10 is to be discarded, the vinyl container 10 is separated from the male screw member 170 by turning the tightening nut 150 upward. . The separated opening and closing device 100 can be repeatedly used for another vinyl container.

Embodiment 2 FIG. 4 is a sectional view showing a state in which a detachable opening / closing device for a vinyl container according to a second embodiment of the present invention is connected to the vinyl container.

The switching device 200 according to the present embodiment is a modification of the switching device 100 according to the first embodiment.
4, the same components as those of the opening / closing device 100 according to the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As can be seen from FIG. 4, the opening and closing device 200 according to the present embodiment is the same as the opening and closing device according to the first embodiment except for the shape of the portion where the first thread 271 of the male screw member 270 is formed. is there. That is, the portion where the first thread 271 is formed has a shape that is gradually enlarged as its diameter goes down.

Therefore, the diameter of the second thread 151 inside the tightening nut 150 is set to match the diameter of the lower end of the first thread 271.

An upper sealing ring 275 is integrally formed on the first thread 271 of the male screw member 270. The upper sealing ring 275 prevents the female screw member 150 from being detached from the male screw member 270.

The lower sealing ring 2 is provided below the first thread 271 of the male screw member 270.
77 are integrally formed. The lower sealing ring 277 further improves the sealing effect of the vinyl container 10 by fixing the female screw member 150 to the male screw member 270 in a tightly adhered state.

A process of attaching the opening / closing device 200 having the above configuration to the vinyl container 10 will be described as follows.

The male screw type member 270 has a female screw type member, that is, a tightening nut 150 fitted on the lower end of the first screw thread 271. In order to attach the opening / closing device 200 to the vinyl container 10, first, Then, the tightening nut 150 is turned up to the upper part of the first thread 271 of the male screw type member 270 and raised. Since the lower part of the first thread 271 is larger in diameter than the upper part, the screw gap 260 becomes wider toward the upper part of the first thread 271.

The portion where the first thread 271 of the male screw member 270 is formed is
Is inserted inside the cut portion 13 of FIG.

While cutting the cut portion 13 and bringing it into close contact with the first thread 271,
The upper end of the zero cut portion 13 is inserted into the widened screw gap 260 between the first thread 271 of the male screw member 270 and the second thread 151 of the fastening nut 150.

Then, the tightening nut 150 is turned down. Since the diameter of the lower part of the first thread 271 of the male screw type member 270 is larger than that of the upper part, the tightening nut 150
Is lowered, the cut portion 13 of the vinyl container 10 fitted in the screwing gap 260 comes into close contact with the male screw member 270 by the fastening nut 150.

Thus, the operation of attaching the opening / closing device 200 to the vinyl container 10 is completed.

The method of using the vinyl container 10 to which the opening / closing device 200 is attached is the same as in the first embodiment.

When the contents of the vinyl container 10 are completely emptied and the vinyl container 10 is to be discarded, the vinyl container 10 is separated from the male screw member 270 by turning the tightening nut 150 up. You. This separated opening and closing device 200 can be reused for another vinyl container.

Embodiment 3 FIG. 5 is a sectional view showing a state in which a detachable opening / closing device for a vinyl container according to a third embodiment of the present invention is connected to a vinyl container.

The switching device 300 according to the present embodiment is a modification of the switching device 100 according to the first embodiment.
5, the same components as those of the opening / closing device 100 according to the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

As can be seen from FIG. 5, the opening and closing device 300 of the present embodiment is the same as the opening and closing device of the first embodiment except for the shape of the portion where the first thread 371 of the male screw member 370 is formed. is there. That is, the portion where the first thread 371 is formed has a shape that is gradually reduced as its diameter goes down.

Accordingly, the diameter of the second thread 151 inside the tightening nut 150 is set so as to match the diameter of the upper end of the first thread 371.

Further, an upper sealing ring 375 is integrally formed above the first thread 371 of the male screw member 370. The upper sealing ring 375 further improves the sealing effect of the vinyl container 10 by fixing the female screw member 150 to the male screw member 370 in a tightly adhered state.

A process of attaching the opening and closing device 300 having the above configuration to the vinyl container 10 will be described as follows.

The male screw type member 370 has a female screw type member, that is, a fastening nut 150 fitted on the upper end of the first screw thread 371. In order to attach the opening / closing device 300 to the vinyl container 10, first, Then, the lower portion of the male screw member 370, that is, the portion where the first thread 371 is formed is inserted inside the cut portion 13 of the vinyl container 10, and the cut portion 13 of the vinyl container 10 is inserted into the lower portion of the fastening nut 150. To be located at

While tightening the cut portion 13 and closely contacting the first thread 371,
Turn 50 to lower. When the fastening nut 150 is lowered, the diameter of the lower part of the first thread 371 is smaller than that of the upper part, so that the screw gap 360 becomes wider toward the lower part of the first thread 371. Therefore, when the fastening nut 150 is lowered, the cut portion 13 of the vinyl container 10 is naturally fitted through the widened screw gap 360 below the first thread 371.

In this way, when the cut portion 13 of the vinyl container 10 is fitted into the screw gap 360 formed by the fastening nut 150 and the male screw member 370, the vinyl container 1
The 0 cut portion 13 is pushed upward from the upper end of the first thread 371 of the male screw member 370.

Then, the tightening nut 150 is turned up. Since the diameter of the upper portion of the first thread 371 of the male screw member 370 is larger than that of the lower portion, if the tightening nut 150 is raised, the cut portion 13 of the vinyl container 10 fitted into the screw gap 360 is tightened. The nut 150 makes close contact with the upper part of the male screw type member 370.

Thus, the operation of attaching the opening / closing device 300 to the vinyl container 10 is completed.

The method of using the vinyl container 10 to which the opening / closing device 300 is attached is the same as that in the first embodiment.

When the contents of the vinyl container 10 are completely emptied and the vinyl container 10 is to be discarded, if the tightening nut 150 is turned down, the vinyl container 1
0 is separated from the external thread type member 370. The separated switching device 300 can be reused for another vinyl container.

Embodiment 4 FIG. 6 is a schematic perspective view of a detachable opening / closing device for a vinyl container according to Embodiment 4 of the present invention. 7A is a cross-sectional view showing a state before the opening and closing device of FIG. 6 is connected to a vinyl container, and FIG. 7B is a cross-sectional view showing a state after the connection.

As shown in FIGS. 6, 7A and 7B, the removable opening / closing device 400 for a vinyl container according to the fourth embodiment of the present invention is accommodated inside the cut portion 13 of the vinyl container 10. It has a male screw type member 470. A first thread 471 is formed on the outer peripheral surface of the male screw member 470. A through hole 473 is formed along the axial direction to allow the contents inside the vinyl container 10 to pass through.

The female screw member 450 is screwed to the male screw member 470 outside the male screw member 470 with the vinyl container 10 interposed therebetween. The female screw-type member 450 is coaxial with the male screw-type member 470 to allow the contents inside the vinyl container 10 to pass therethrough.
3 is a cylindrical nut member formed.

An inner peripheral surface of the lower portion of the female screw member 450 is screwed with a screw gap 460 between the male screw member 470 and the first thread 471 outside the male screw member 470. A second thread 451 is formed on the second thread 451. By cutting the cut portion 13 of the vinyl container 10 into the screw gap 460, the vinyl container 10 is sealed by screwing the female screw member 450 and the male screw member 470.

A third thread 457 is formed on the outer peripheral surface of the upper part of the female screw member 450.

A lower sealing ring 475 is integrally formed at the lower end of the male screw member 470.
The sealing ring portion 475 allows the female screw type member 450 to be tightly fixed to the male screw type member 470 to further improve the sealing effect of the vinyl container 10.

A knob 479 extending downward is formed at the lower end of the lower sealing ring 475 of the male screw type member 470. After inserting the male screw member 470 into the vinyl container 10 and holding the knob 479 of the male screw member 470 from the outside of the vinyl container 10, the positions of the vinyl container 10 and the male screw member 470 with respect to each other. Can be easily fixed.

A cover member 410 is provided above the female screw member 450. The lid member 4
A fourth screw thread 417 is formed at a lower portion of the inner peripheral surface of the ten. The lid member 410
The fourth screw thread 417 of the third screw thread 4 formed on the upper part of the female screw member 450
57 is screwed. The lid member 410 opens and closes the vinyl container 10 to the outside by opening and closing the through hole 453 of the female screw member 450.

Hereinafter, a process of attaching the detachable opening / closing device 400 for the vinyl container to the vinyl container 10 will be described.

First, in order to transfer the contents, the end of the vinyl container 10 containing the contents is cut off.

As shown in FIGS. 7A and 7B, the lower portion of the male screw member 470, that is, the portion where the first thread 471 is formed, is inserted into the cut portion 13 of the vinyl container 10. While cutting the cut portion 13 of the vinyl container 10 into close contact with the first thread 471, the cut portion 13 of the vinyl container 10 is connected to the second thread 451 of the female screw member 450.
Fit inside.

Then, as shown in FIG. 7B, the female screw member 450 is turned down. The cut portion 13 of the vinyl container 10 fitted in the screw gap 460 between the male screw member 470 and the female screw member 450 is formed by the male screw member 470 by the female screw member 450.
The opening / closing device 400 is installed in the vinyl container 10 in close contact with.

The method of using the vinyl container 10 to which the opening / closing device 400 is attached is as follows.

The lid 410 is opened and the contents are transferred to a desired container. Then, cover member 4
10 is closed and the vinyl container 10 is stored in a sealed state.

When the contents of the vinyl container 10 are completely emptied and the vinyl container 10 is to be discarded, the female screw member 450 is turned upward to raise the male screw member 47.
When separated from zero, the vinyl container 10 is separated from the male screw type member 470. The separated opening / closing device 400 can be reused for another vinyl container.

Fifth Embodiment FIG. 8A is a sectional view showing a state before a vinyl container detachable opening / closing device according to a fifth embodiment of the present invention is connected to a vinyl container, and FIG. is there.

The switching device 500 according to the present embodiment is a modification of the switching device 400 according to the fourth embodiment.
8A and 8B, the same components as those of the opening / closing device 400 according to the fourth embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As can be seen from FIGS. 8A and 8B, the opening / closing device 500 according to the present embodiment includes a portion where the first thread 571 of the male screw member 570 and the second thread 551 of the female screw member 550 are formed. The configuration is the same as that of the opening / closing device 400 according to the fourth embodiment except for the shape. That is,
The portion where the first thread 571 is formed and the portion where the second thread 551 is formed have a shape that is gradually enlarged as their diameters go down.

The process of attaching the opening / closing device 500 having the above configuration to the vinyl container 10 will be described as follows.

As shown in FIGS. 8A and 8B, the portion of the male screw member 570 where the first thread 571 is formed is inserted inside the cut portion 13 of the vinyl container 10. Holding the knob 579 from the outside of the vinyl container 10, the cut portion 13 of the vinyl container 10 is moved to the first position.
Closely contact the thread 571.

The cut portion 13 of the vinyl container 10 is fitted inside the second thread 551 of the female screw member 550. At this time, the cut portion 13 of the vinyl container 10 is
Is extremely easy to fit inside the second thread 551 of the male screw member 570 because the diameter of the lower portion of the first thread 571 of the male screw member 570 is larger than that of the upper thread, and the female screw member 550 Of the second thread 551 is larger than that of the upper thread. That is, since the diameter of the upper end of the first thread 571 is relatively smaller than that of the lower end of the second thread 551, the screw gap 560 at the start of the screwing of the male screw member 570 and the female screw member 550 is reduced. Because it is relatively wide.

Then, as shown in FIG. 8B, the female screw member 550 is turned down. The cut portion 13 of the vinyl container 10 fitted in the screw gap 560 between the male screw member 570 and the female screw member 550 is brought into close contact with the female screw member 550 and the male screw member 570.

Thus, the work of attaching the opening and closing device 500 to the vinyl container 10 is completed.

The method of using the vinyl container 10 to which the opening / closing device 500 is attached is the same as that of the fourth embodiment.

When the contents of the vinyl container 10 are completely emptied and the vinyl container 10 is to be discarded, the female screw member 550 is turned to separate from the male screw member 570 as in the fourth embodiment. Then, the vinyl container 10 is naturally separated from the male screw member 570. The separated switching device 500 can be reused for another vinyl container.

As described above, according to the detachable opening / closing device for a vinyl container according to each embodiment of the present invention, the cut portion of the vinyl container is completely sealed by the male screw type member and the female screw type member, A through-hole is formed along the central axis of the male screw member, and a lid member for opening and closing is formed above the through-hole. Therefore, if the lid member is opened, the contents of the vinyl container can be easily and cleanly transferred, and if the lid member is closed, the contents can be stored easily and cleanly.

Further, according to the detachable opening / closing device for a vinyl container according to each embodiment of the present invention, the vinyl container is unscrewed from the externally threaded member to release the vinyl container from the opening / closing device. One opening and closing device can be reused for another vinyl container.

As described above, the present invention has been described based on the specific embodiments. However, the present invention is not limited to these embodiments, and can be modified or improved within the ordinary knowledge of those skilled in the art. Of course.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a conventional vinyl container in a cut state.

FIG. 2 is a perspective view schematically showing a detachable opening / closing device for a vinyl container according to Embodiment 1 of the present invention.

3A is a cross-sectional view showing a state before the opening and closing device of FIG. 2 is connected to a vinyl container, and FIG. 3B is a cross-sectional view showing a state after the connection.

FIG. 4 is a cross-sectional view illustrating a state in which a detachable opening / closing device for a vinyl container according to a second embodiment of the present invention is coupled to the vinyl container.

FIG. 5 is a cross-sectional view illustrating a state in which a detachable opening / closing device for a vinyl container according to a third embodiment of the present invention is coupled to the vinyl container.

FIG. 6 is an exploded perspective view of a detachable opening / closing device for a vinyl container according to a fourth embodiment of the present invention.

7A is a cross-sectional view showing a state before coupling the opening and closing device of FIG. 6 to a vinyl container, and FIG. 7B is a cross-sectional view showing a state after coupling.

8A is a cross-sectional view showing a state before a detachable opening / closing device for a vinyl container according to a fifth embodiment of the present invention is connected to the vinyl container, and FIG. 8B is a cross-sectional view showing a state after the connection. .

Claims (14)

[Claims] In order to facilitate the transfer and storage of the contents in a vinyl container, and to keep the storage state clean, a first screw thread is formed on the outer peripheral surface of the vinyl container. ,
A male screw-type member having a through hole formed in the vinyl container along the axial direction to allow the contents in the vinyl container to pass therethrough; the male screw-type member can be screwed with the male screw-type member across the vinyl container. A second thread is formed on the inner peripheral surface of the vinyl container so as to be screwed with a screw gap between the first screw and the first screw outside, and a cut portion of the vinyl container is arranged in the screw gap. A female screw-type member that seals the vinyl container by screwing with the male screw-type member; and an external member that is formed on the upper part of the male screw-type member and opens and closes the through-hole to open and close the vinyl container. A lid member for opening or closing the container with respect to a removable container for a vinyl container. 2. A lower sealing ring is formed below the first thread of the male screw member so that the female screw member is firmly fixed to the lower sealing ring. The detachable opening / closing device for a vinyl container according to claim 1, wherein the sealing effect of the vinyl container is further improved. 3. An upper sealing ring is formed above the first thread of the male screw member, and the upper sealing ring prevents the female screw member from detaching from the male screw member. The detachable opening / closing device for a vinyl container according to claim 1. 4. The removable container for a vinyl container according to claim 1, wherein the portion of the externally threaded member where the first thread is formed is gradually enlarged as its diameter goes down. Switchgear. 5. The diameter of the second thread inside the female screw member is set to be equal to the diameter of the lower end of the first thread of the male screw member. The detachable opening / closing device for a vinyl container according to claim 4, wherein a screw gap formed between the male screw type member and the female screw type member is widened. 6. A lower sealing ring is formed at a lower portion of the first thread of the male screw member so that the female screw member is fixed to the lower sealing ring in a tightly adhered state. The detachable opening / closing device for a vinyl container according to claim 4, wherein the sealing effect of the vinyl container is further improved by doing so. 7. An upper sealing ring is formed above the first thread of the male screw member, and the upper sealing ring prevents the female screw member from detaching from the male screw member. The detachable opening / closing device for a vinyl container according to claim 4, wherein 8. The removable container for a vinyl container according to claim 4, wherein the portion formed with the first thread of the externally threaded member is gradually reduced as its diameter goes down. Switchgear. 9. The diameter of the second thread inside the female thread member is set to match the diameter of the upper end of the first thread of the male thread member, and goes down below the first thread. 9. The detachable opening / closing device for a vinyl container according to claim 8, wherein the screwing gap between the male screw type member and the female screw type member becomes wider as the screw width increases. 10. An upper sealing ring is formed on the upper part of the first thread of the male screw member so that the female screw member is firmly fixed to the upper sealing ring. The detachable opening / closing device for a vinyl container according to claim 8, wherein the sealing effect of the vinyl container is further improved. 11. In order to facilitate the transfer and storage of the contents in the vinyl container, and to keep the storage state clean, the vinyl container is housed inside a cut portion of the vinyl container, and a first thread is formed on the outer peripheral surface. ,
A male screw-type member having a through hole formed in the vinyl container along the axial direction to allow the contents in the vinyl container to pass therethrough; A second thread is formed on an inner peripheral surface of a lower portion of the vinyl container so as to be screwed with a thread gap between the first thread and the outside of the vinyl container. By disposing the female screw member, the vinyl container is sealed by screwing with the male screw member, and a female screw member having a third thread formed on an outer peripheral surface of an upper portion thereof; A third screw thread formed on an upper portion of the female screw member on an inner peripheral surface of a lower portion thereof to be opened or closed to open or close the vinyl container to the outside by opening and closing the through hole; A lid member formed with a fourth screw thread to be screwed with the cover member. Removable closing device for plastic containers according to claim. 12. The portion of the male threaded member having the first thread and the portion of the female threaded member having the second thread are gradually increased in diameter as going downward. The detachable opening / closing device for a vinyl container according to claim 11, characterized in that: 13. A lower sealing ring portion is formed below the first thread of the male screw member so that the female screw member is fixed to the lower sealing ring member in a tightly adhered state. The detachable opening / closing device for a vinyl container according to claim 11, wherein the sealing effect of the vinyl container is further improved. 14. A lower end of the male screw member is formed with a knob extending downward. After the male screw member is inserted into a vinyl container, the male screw member is picked from the outside of the vinyl container. The detachable opening / closing device for a vinyl container according to claim 11, wherein the position of the vinyl container and the male screw member can be easily fixed to each other by grasping.